PROBLEM TO BE SOLVED: To provide an emitter in which a film can be easily deformed without reducing the durability of the film, and which can quantitatively discharge liquid for irrigation even in the case where the pressure of the liquid for irrigation is low.SOLUTION: An emitter has: an emitter body having at least a recessed part and an open hole； and a film having flexibility which is bonded to at least one surface of the emitter body, and clogs at least a part of an opening of the recessed part and the open hole. The emitter has a flow rate reducing part which reduces the flow rate of liquid for irrigation corresponding to the pressure of the liquid for irrigation in the tube. The flow rate reducing part includes: a recessed part； a diaphragm part which is a part of the film； and a valve seat part to which the diaphragm part can be tightly adhered. The diaphragm part includes a ring-shaped thin wall part which is arranged so as to surround a region which can be tightly adhered to a valve seat part of the diaphragm part. The thin wall part is recessed against the inside of the tube, and formed in a front and rear relationship so as to protrude toward the recessed part.SELECTED DRAWING: Figure 4【課題】フィルムの耐久性を低下させることなく、フィルムを変形し易くし、かつ灌漑用液体の圧力が低い場合であっても、灌漑用液体を定量的に吐出できるエミッタを提供することである。【解決手段】エミッタは、少なくとも凹部および貫通孔を有するエミッタ本体と、エミッタ本体の少なくとも１つの面に接合され、凹部および貫通孔の少なくとも一部の開口部を塞いでいる可撓性を有するフィルムとを有する。エミッタは、チューブ内の灌漑用液体の圧力に応じて、灌漑用液体の流量を減少させる流量減少部を有する。流量減少部は、凹部と、フィルムの一部であるダイヤフラム部と、ダイヤフラム部が密着可能な弁座部とを含む。ダイヤフラム部は、ダイヤフラム部の弁座部に密着可能な領域を取り囲むように配置されている、環状の薄肉部を含む。薄肉部は、チューブの内部に対して窪み、かつ凹部に対して突出するように裏表の関係で成形されている。【選択図】図４
